21179041 has 8 divisors (see below), whose sum is σ = 22846824. Its totient is φ = 19516800.

The previous prime is 21179033. The next prime is 21179047. The reversal of 21179041 is 14097112.

It can be written as a sum of positive squares in 4 ways, for example, as 893025 + 20286016 = 945^2 + 4504^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21179041 - 2³ = 21179033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21178997 and 21179015.

It is not an unprimeable number, because it can be changed into a prime (21179047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10191 + ... + 12091.

It is an arithmetic number, because the mean of its divisors is an integer number (2855853).

Almost surely, 2^21179041 is an apocalyptic number.

It is an amenable number.

21179041 is a deficient number, since it is larger than the sum of its proper divisors (1667783).

21179041 is a wasteful number, since it uses less digits than its factorization.

21179041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 21179041 is about 4602.0692085191. The cubic root of 21179041 is about 276.6742642387.

The spelling of 21179041 in words is "twenty-one million, one hundred seventy-nine thousand, forty-one".